mb/google/zork: Add Picasso based Zork mainboard and variants

This is a copy of the mb/google/zork directory from the chromiumos
coreboot-zork branch. This was from commit 29308ac8606.

See https://chromium.googlesource.com/chromiumos/third_party/coreboot/+/29308ac8606/src/mainboard/google/zork

Changes:
* Minor changes to make the board build.
* Add bootblock.c.
* Modify romstage.c
* Removed the FSP_X configs from zork/Kconfig since they should be
  set in picasso/Kconfig. picasso/Kconfig doesn't currently define the
  binaries since they haven't been published. To get a working build
  a custom config that sets FSP_X_FILE is required.

BUG=b:157140753
TEST=Build trembyle and boot to OS

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I3933fa54e3f603985a0818852a1c77d8e248484f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41581
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/mainboard/google/zork/sku_id.c b/src/mainboard/google/zork/sku_id.c
new file mode 100644
index 0000000000..82ee355084
--- /dev/null
+++ b/src/mainboard/google/zork/sku_id.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <boardid.h>
+#include <baseboard/variants.h>
+#include <ec/google/chromeec/ec.h>
+
+uint32_t sku_id(void)
+{
+	return google_chromeec_get_board_sku();
+}
+
+/* An unprovisioned SKU ID indicates we're in the factory booting prior to
+   proper SKU ID provisioning. */
+int boot_is_factory_unprovisioned(void)
+{
+	return sku_id() == CROS_SKU_UNPROVISIONED;
+}